nested loops

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• Nested loop join — A nested loop join is a naive algorithm that joins two relations R and S by making two nested loops: For each tuple r in R do For each tuple s in S do If r and s satisfy the join condition Then output the tuple <r,s> This algorithm will… …   Wikipedia

• Nested function — definitions can be compared to how a Matryoshka doll nests within larger versions of itself, in several levels. In computer programming, a nested function (or nested procedure/subroutine) is a function which is lexically (textually) encapsulated… …   Wikipedia

• Control flow — Not to be confused with Flow control. In computer science, control flow (or alternatively, flow of control) refers to the order in which the individual statements, instructions, or function calls of an imperative or a declarative program are… …   Wikipedia

• Loop optimization — In compiler theory, loop optimization plays an important role in improving cache performance, making effective use of parallel processing capabilities, and reducing overheads associated with executing loops. Most execution time of a scientific… …   Wikipedia

• Frameworks supporting the polyhedral model — Use of the polyhedral model within a compiler requires software to represent the objects of this framework (sets of integer valued points in regions of various spaces) and perform operations upon them (e.g., testing whether the set is empty). Two …   Wikipedia

• Mason's rule — Mason s gain formula (MGF) is a method for finding the transfer function of a linear signal flow graph (SFG). The formula was derived by Samuel Jefferson Mason[1] and is named after its discoverer. MGF is an alternate method to finding the… …   Wikipedia

• For loop — In computer science a for loop is a programming language statement which allows code to be repeatedly executed. A for loop is classified as an iteration statement.Unlike many other kinds of loops, such as the while loop, the for loop is often… …   Wikipedia

• Perl control structures — The basic control structures of Perl are similar to those used in C and Java, but they have been extended in several ways.LoopsIn the following, label is an optional identifier terminated by a colon, and block is a sequence of one of more Perl… …   Wikipedia

• Query optimizer — The query optimizer is the component of a database management system that attempts to determine the most efficient way to execute a query. The optimizer considers the possible query plans for a given input query, and attempts to determine which… …   Wikipedia

• List comprehension — A list comprehension is a syntactic construct available in some programming languages for creating a list based on existing lists. It follows the form of the mathematical set builder notation (set comprehension) as distinct from the use of map… …   Wikipedia

• Query plan — A query plan (or query execution plan) is a set of steps used to access or modify information in a SQL relational database management system. This is a specific case of the relational model concept of access plans.Since SQL is declarative, there… …   Wikipedia